"The last dream of the night is the one that patients are most likely to remember," explains Cartwright. While the first group was actively working through their blues, resulting in more pleasant dreams at the end of the night and a brighter morning mood, those whose dreams became increasingly unpleasant were more likely to feel low when they woke. Still, this finding has a positive aspect. It allows sleep therapists to predict which of the depressed persons need the most help. It also tells them the topics that disturb their patients most. "If patients remember a bad dream," notes Cartwright, "then whatever that dream is about, that's what therapists should focus treatment on. The patient clearly isn't able to adjust his or her mood, and therapists should work on that." - thus turning troubled visions into sweet dreams.